It comes after plus-sized models took part in New York Fashion week and Sports Illustrated's swimsuit issue.

Derek Daniels from Assets Model Agency says none of the plus size models on their books are obese.

"If somebody is being used as a plus sized model, you'll generally find they are exceptionally tall, they're big-boned, they're shapely. They're not hugely obese people. I don't think under any circumstances that this industry is trying to promote obesity, but there are people within the industry taking advantage of people."